KR20020077734A - 3-dimensional picture displaying apparatus - Google Patents

Abstract

PURPOSE: A stereoscopic image display device is provided to cut down the price of a stereoscopic image display device despite a wide screen, to prevent a user from the tiredness even in the long-time watching, and to make the user watch the display device easily. CONSTITUTION: A video player(1) comprises an analog/digital converter(13), a memory(18) for moving a digital two-dimensional image corresponding to the time difference of the left and right eyes and storing the original image as the image for the left eye and the image formed after movement as the stereoscopic image for the right eye, a reading unit(20) for reading the images at a high speed, and a digital/analog converter(21) for converting the digital signals to analog signals and generating a high-speed synchronizing signal. A TV receiver includes high-speed synchronizing signal generators, switches for selectively switching the normal-speed and high speed synchronizing signals, and a switching signal generator for generating a switching signal when a 3D(3-dimensional) signal(Q) is received. The image displayed at a high speed is recognized by liquid crystal shutter glasses.

Description

Stereoscopic Image Display Apparatus {3-dimensional picture displaying apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display device, and to a stereoscopic image display device using left and right polarized glasses or left and right shutter attached glasses.

For displaying two-dimensional image software as three-dimensional stereoscopic images, Japanese Patent Laid-Open No. 9-23452, Japanese Patent Laid-Open No. 8-205201 (Sony), Japanese Patent Laid-Open No. 9-200804 (Samsung Electronics) , US Patent 5510832 and the like.

On the other hand, 3D Comsa and Arisawa are known as three-dimensional image display devices currently available in Japan.

Among the conventional stereoscopic image display devices, the inexpensive product is composed of 30 frames (60 fields) per second. Accordingly, a lot of flickering occurs on the screen, making it difficult to watch. On the other hand, a wide screen device that composes the screen at twice the frames per second, that is, 60 frames (120 fields) is expensive, and when using a PC monitor, only a relatively narrow screen can be realized.

An object of the present invention is to provide a three-dimensional image display device that is easy to watch without being tired even when watching a long time, inexpensive and large screen with a large size.

1 is a view showing the overall appearance of a stereoscopic image display device of the present invention.

Figure 2 is a block diagram of the left and right image production unit of the present invention stereoscopic display device.

3 is a block diagram illustrating an embodiment of an image processing unit displaying left and right images of a stereoscopic image display apparatus according to the present invention.

3 is a block diagram illustrating another embodiment of an image processor for displaying left and right images of a stereoscopic image display apparatus according to the present invention.

5 is a diagram illustrating left and right images displayed on a display unit of a stereoscopic image display device according to the present invention.

A stereoscopic image display apparatus for displaying a stereoscopic image by signal processing a conventional video signal according to the present invention for solving the technical problem,

An analog / digital converter for converting an analog signal of a reproduced two-dimensional image into a digital signal; The converted digital two-dimensional image is moved only in the horizontal direction corresponding to the parallax of the left and right eyes, the original image is a two-dimensional image corresponding to the left eye or the right eye, and the image after the movement is stored as a two-dimensional image for the right or left side. Memory; A reading unit which reads these left and right images alternately for each frame screen at high speed; A timing unit configured to output an open / close signal in accordance with the read timing of the left and right images; And a digital / analog converter for converting the digital signal of the left and right images from the reader into an analog signal and generating a high speed synchronization signal.

A high speed synchronous signal generator in addition to a normal speed synchronous signal generator; A switch for selectively switching the normal speed and the high speed synchronous signal; A TV receiver having a built-in; a switching signal generator for generating a switching signal in a state of receiving a signal from the digital / analog converter,

The digital / analog converter sends the left and right image signals to the TV receiver together with the high speed synchronization signal, and the display unit of the TV receiver alternately displays the left and right screens at high speed according to the high speed synchronization signal and the switching signal. The displayed image is alternately viewed by the left and right eyes through a liquid crystal shutter glasses opened and closed by an opening and closing signal from the timing unit, thereby providing a pseudo stereoscopic effect in the two-dimensional image.

The video image recording and reproducing apparatus may be a VTR or DVD apparatus.

The normal speed scanning vertical synchronizing signal corresponds to 60 Hz and the high speed vertical synchronizing signal corresponds to 120 Hz.

Hereinafter, the case where the video recording and reproducing apparatus is VTR for the stereoscopic image display apparatus of the present invention will be described as an example.

1 shows the overall appearance of a stereoscopic image display device. The stereoscopic image display device shown in FIG. 1 includes a mounted VTR 1, an improved TV receiver 2, an infrared light emitting device 3, and a shutter-mounted glasses 4. In the mounted VTR 1, a video tape 5 of a two-dimensional (2D) image can be reproduced in place of the image of the TV receiver 2.

The VTR (1) produces a three-dimensional (3D) image from a two-dimensional (2D) image, and the display unit (CRT) 50 of the advanced TV receiver 2 is used for the left eye by a normal scan and a double speed (high speed) scan. The image and the image for the right eye are alternately displayed in time.

The shutter-mounted eyeglasses 4 are provided with liquid crystal shutters corresponding to the left and right liquid crystal lenses and alternately open and close the left and right liquid crystal lenses in accordance with the infrared open / close signals output from the infrared light emitting device 3.

The shutter-attached glasses 4 and the infrared light emitting device 3 used for generating a three-dimensional image from a two-dimensional (2D) image are disclosed in detail in US Pat. No. 5,808,588, and a detailed description thereof will be omitted.

Next, various terms used in the description will be limited.

The low-speed scan TV in the present invention leads to screen display of a weather radar or the like which is slower than a normal scan TV display defined by NTSC or PAL.

The scan TV display is generally used for general TVs. The number of scans of 30 screens (frames) per second is 525, which is further subdivided in an interlaced conventional scan, whereby 262 odd scan lines and 263 even scan lines alternate for 1 second. Shows 60 fields.

The fast scan TV display is used for recent large digital screens and has 525 scans of 60 screens (frames) per second, which is further subdivided in interlaced high-speed scans, with 262 radix scan lines and 263 even scan lines alternated for one second. 120 fields are displayed and the scan line may be increased.

In high-definition TVs, the display speed is the same as that of a normal scan, and the number of scanning lines in each field is doubled and subdivided, such as 1024.

Displayed on a PC screen is usually a non-interlaced type, which is a high resolution scan, and an expensive large-screen digital display automatically responds to characteristics of an incoming video signal so that a non-interlaced high resolution can be displayed by a high-speed scan.

Next, the configuration of the mounted VTR 1 and the improved TV receiver 2 will be described in detail with reference to FIGS. 2 and 3.

In FIG. 2, the mounted VTR 1 is composed of a conventional VTR unit and a three-dimensional (3D) image generating apparatus, and a detailed description thereof is omitted, and the two-dimensional (2D) image is three-dimensional (3D). A circuit for generating an image will be described in detail.

The mounted VTR 1 includes a VTR unit 10, a TV tuner 11, an amplifier 12, an analog to digital (A / D) converter 13, a basic memory 14, a copy memory 15, a shifter ( 17), regulator 16, video memory 18, double speed readout 20, digital-to-analog converter (D / A) 21, CPU 23 and input 24.

The VTR unit 10 is equipped with the video tape 5 of FIG. 1 to reproduce a normal 2D movie or a sports video.

The TV tuner 11 is installed in a recent VTR in the same manner as a general accessory. A composite signal obtained by synthesizing a video signal and a synchronization signal is output from the VTR unit 10 or the TV tuner 11, and the composite signal is an amplifier. Is amplified at 12. This composite video signal is an NTSC or PAL signal, which is 30 frames (or 60 fields) of screens per second.

In general, the 2D composite signal from the VTR unit 10 can be viewed by connecting the video output terminal to the video input terminal of the improved TV receiver 2 by the cable 25.

In NTSC or PAL, one screen (frame) is composed of one field (1 vertical synchronization period) consisting of approximately 262 scanning lines as the radix field, and one field (next vertical synchronization period) consisting of approximately 263 (excellent) fields. (Frame) consists of 2 fields.

The A / D converter 13 takes in this composite signal and converts it into a pixel digital signal in units of one screen. The digital signal of one screen unit is temporarily moved to the basic memory 14, and then the digital signal is temporarily transferred to the copy memory 15. The output signal of the A / D converter 13 is data in a screen unit determined by 30 frames for 1 second without discriminating 60 fields for 1 second and even field and odd field.

The copy screen is then sent to the shifter 17 where it is only horizontally shifted left or right. At this time, the horizontal movement amount is adjusted by the adjuster 16. This adjuster 16 is provided as a handle in the case of the mounted VTR 1 as shown in FIG. 1, and is set manually.

The left and right eyes of a person are about 7 to 8 cm apart from each other, so even if the same object is seen, the images reflected by the left and right eyes are different (shift) in the horizontal direction. An image having such a left and right position difference is recognized by a person as a three-dimensional object in a three-dimensional space.

The shifter 17 and the adjuster 16 produce this left and right positional shift (shift). Since the distance between the left and right eyes varies slightly depending on the person, the adjuster 16 is used.

Here, the basic image from the basic memory 14 and the shift image from the shifter 17 are stored in the video memory 18. The video memory 18 is a video recording apparatus consisting of a plurality of pages in which the basic video and the shift video for the right or left eye are stored in different pages.

By introducing a control signal to the CPU 23, the double speed reading unit 20 alternately reads the basic image and the shift image from the video memory 18 in units of screens, and outputs an image signal to the D / A converter 21 for timing. The unit 25 outputs the timing signal P to the infrared light emitting device 3, respectively.

The double speed readout unit 20 controls the read speed to the video memory 18 in accordance with a command from the CPU 23. The CPU 23 is inputted with a command for a read speed by using a key or the like of the input unit 24.

The timing signal P is an alternating signal for opening the right eye shutter when the basic image is read from the video memory 18 and opening the left eye shutter when the shift image is read.

For example, the double speed reading unit 20 reads the base image for the first 1/60 second, the shift image for the next 1/60 second, and the base image of the next screen in the third 1/60 second. The shift image is read out at / 60 seconds, and then alternately read out alternately.

Therefore, 60 screens (high speed screens) are read out every 30 screens per second without interruption of the basic video and the shift video.

In the case of a non-interlaced digital display device (CRT, large liquid crystal) of non-interlacing type which does not distinguish between odd and even scan lines, 60 screens are read left and right every second in the attached VTR 1 according to the present embodiment, When inputted, three-dimensional images can be viewed on a screen of a large display device using glasses with shutters adapted to the left and right display speeds.

However, in the present embodiment, since the 3D image is viewed on the low cost improved TV receiver 2 as a popular type, the scanning circuit is improved as follows.

The digital video signal of 60 times per second is converted into a high speed composite signal by the D / A converter 21 again. In the D / A converter 21, a double speed video composite signal consisting of a horizontal synchronization signal of 30,800 Hz is generated so as to include a vertical synchronization signal of 120 Hz and an even horizontal synchronization field (60 fields) and even horizontal synchronization period (60 fields) in one vertical period. do.

Next, the structure of the improved TV receiver 2 is demonstrated in detail with reference to FIG.

The improved TV receiver 2 adds a double speed scanning (scan) circuit composed of a horizontal amplifier 37, a vertical amplifier 38, and a closed signal generator 51 of variable amplification factor to a conventional TV receiver. Here, the description of the conventional TV block configuration will be briefly described in detail with a focus on additional circuits.

In the improved TV receiver 2, a horizontal amplifier designed and added to the horizontal sawtooth wave generator 35, the vertical sawtooth generator 36, the horizontal deflection coil 39, the vertical deflection coil 40, and the like of a conventional TV, 37) and a vertical amplifier 38 and a close signal generator 51.

The TV tuner 42, the first detector 43, the audio signal processor 45, the speaker 44, the sync separator 46, the image processor 47, the display device 50, and the horizontal synchronizer 54 ) And the vertical synchronizer 55 are the component circuits of a conventional TV.

Therefore, these horizontal synchronizers 54 and vertical synchronizers 55 serve as pulse generators for a normal scan for 60 Hz or a high-speed scan for 120 Hz per second in response to each normal / high speed sync signal from the sync separator 46. It generates by selectively following the synchronous signal.

In addition, in a conventional TV, the horizontal deflection coil 39 and the vertical deflection coil 40 are physically attached around the display device 50 to deflect the electron beam.

The 3D video signal from the mounted VTR 1 is sent to the advanced TV receiver 2 by the cable 22. In the state where the closed signal generator 51 of the physical structure is installed as the accommodating terminal of the cable 22 on the side of the improved TV receiver 2 and the cable 22 is mounted, the synchronous separation unit 46 is connected to the cable 22. The wiring of the other cable 25 is cut off and connected. In addition, the closed signal generator 51 generates a closed state signal ON as an electronic function.

On the contrary, when the cable 22 is not mounted, the closed signal generator 51 is connected to the conventional 2D cable 25 by selecting the synchronous separation unit 46, and no closed state signal is generated.

The closed state signal is sent to the horizontal amplifier 37 and the vertical amplifier 38 to change the amplification factor.

The horizontal amplifier 37 and the vertical amplifier 38 are usually set at a constant amplification factor, but when a closed state signal is input, the amplification factor is increased by a predetermined multiple.

The reason is that the horizontal sawtooth wave generator 35 and the vertical sawtooth wave generator 36 generate a sawtooth wave due to a voltage change due to, for example, discharge or charge time by RC coupling.

These oscillators are started regularly in response to NTSC (the frequency is slightly reduced in YAL, but the description below will be omitted). At 30 Hz, the oscillator starts and responds to the horizontal synchronization signal of 15,750 Hz and the vertical synchronization signal of 60 Hz (for field). To generate sawtooth waves respectively.

It is necessary to repeat the discharge or charging with a slightly faster time pitch in order to raise the frequency of RC, which determines the time constant, to be constant.

By discharging and charging with a slightly faster time pitch, the frequency of these sawtooth waves can be set to 120 Hz. At this time, the shortage where the voltage does not reach the prescribed value is amplified by the horizontal amplifier 37 and the vertical amplifier 38.

In addition, 2D images from the VTR unit 10 or the TV tuner 11 of the mounted VTR 1 are digitized by the analog-to-digital converter 13, and the basic memory 14, the copy memory 15, and the shifter 17 are digitized. The left and right images shifted in the horizontal direction are formed as the adjuster 16 and the video memory 18.

Each of the left and right images is read by the double speed reading section 20 at alternating speeds of 120 Hz, and sent to the digital-to-analog converter 21. The digital-to-analog converter 21 outputs a composite analog video signal (double speed composite signal) corresponding to a screen display speed of 120 Hz to the improved TV receiver 2 via a cable 22.

The closed signal generator 51 outputs the closed state signal ON and the double speed composite signal is separated from the sync signal and the video signal by the sync separator 46.

The video signal of the screen composed of twice as many frames as the normal screen is sent from the image processor 47 to the display device 50.

At the same time, the separated double speed horizontal synchronizing signal is sent to the horizontal sawtooth wave generator 35 through the horizontal synchronizing generator 54, and the vertical synchronizing signal of the double speed is sent to the vertical sawtooth wave generator 36 through the vertical synchronizing generator 55, respectively.

The horizontal sawtooth wave generator 35 generates a sawtooth wave of 31,500 Hz, and the vertical sawtooth wave generator 36 generates a sawtooth wave of 120 Hz, respectively, and the horizontal amplifier 37 and the vertical amplifier 38 are closed states output from the closed signal generator 51. Depending on the signal, these sawtooth waves are amplified to the specified amplitude.

Accordingly, the horizontal deflection coil 39 and the vertical deflection coil 40 are excited at a specified voltage, and the display device 50 scans the image electron beam from the image processor 47 at a screen speed of 120 Hz throughout the screen.

In addition, in the video memory 18, the basic image and the shift image are read out alternately by the double speed reading unit 20, but the shutter (open / close) signal is sent to the infrared light emitting device 3 in synchronization with the reading of the left and right images.

Therefore, the left and right eyes of the person viewing the stereoscopic image are alternately shown, as shown in FIG. 5, the objects when viewed with the right and left eyes appear to appear on the left and right sides of the screen, respectively. The images shifted left or right on one frame are adjusted to be viewed alternately through the shutter-mounted glasses 4 at 30 Hz periods, respectively.

That is, the lens shutter of the left eye is opened for 1/30 seconds and the image formed on the retina of the left eye in an interlaced manner is displayed on the display device 50 at the radix field screen for 1/60 second, and at the next 1/60 second. The field screen is displayed.

In addition, the lens shutter of the right eye is closed for the first 1/60 second, and the image reflected on the immediately preceding right lens is displayed as an afterimage in the right eye instead of the image of the display device 50 currently displayed. On the contrary, during the next 1/30 second, the left eye is directly illuminated with the left image displayed on the display device 50 as the afterimage, and the right eye is directly illuminated with the right image being displayed on the display device 50.

The brain synthesizes the images from the left and right eyes and recognizes the 3D image displayed on the display device 50. The 30Hz screen can be seen on the left and right eyes, so it is recognized as a smooth 3D image without difficulty.

In addition, the same 3D image can be seen even when the 3D-processed image output of the mounted VTR 1 is transmitted to an existing high-speed variable display device (2036S, manufactured by Sony Corporation, etc.).

The audio signal is inputted from the VTR unit 10 or the TV tuner 11 to the audio circuit of the improved TV receiver 2 with a conventional audio cable 25.

A second embodiment of the improved TV receiver 2 will be described in detail with reference to FIG.

The improved TV receiver 2 has a double horizontal synchronous signal oscillator 30, a double vertical synchronous signal oscillator 31, a horizontal switching switch 32, a vertical switching switch 33 and a closed signal generator ( A double speed scan circuit composed of 51) is added.

In this case, in addition to the 60 Hz RC (resistance capacitor) of the horizontal sawtooth generator 35 and the vertical sawtooth generator 36, respectively, 120 Hz RCs are separately installed, and these are switched by an electronic switch. The amplification ratios of the horizontal amplifier 37 and the vertical amplifier 38 do not have to be changed.

The double horizontal synchronous signal oscillator 30 shown in FIG. 4 is an RC circuit on a screen to which the frequency of the vertical synchronous signal is applied at 120 Hz (horizontal frequency 31,500 Hz), and the double vertical synchronous signal oscillator 31 is used for 120 Hz. Each of the RC circuits for 60 Hz, which are equivalent to the RC circuits in the horizontal sawtooth wave generator 35 and the vertical sawtooth wave generator 36, is separately displayed as the horizontal synchronous signal oscillator 60 and the vertical synchronous signal oscillator 61. Doing.

Double horizontal synchronous signal oscillator 30 and horizontal synchronous signal oscillator 60 in horizontal switching switch 32, double vertical synchronous signal oscillator 31 and vertical synchronous signal oscillator 61 in vertical switching switch 33 Switch each at the same time.

RC for the double horizontal synchronous signal oscillator 30 has a steep time constant in the horizontal oscillator inside the horizontal sawtooth generator 35 and at the same time the RC for the double vertical synchronous signal oscillator 31 is the vertical sawtooth generator 36 The timing constant is shorter than that of the internal vertical oscillator.

As described above, the closed signal generator 51 generates this closed state signal ON when the cable 22 of the high speed video is mounted.

The closed state signal is sent to the horizontal synchronous signal switching switch 32 and the vertical synchronous signal switching switch 33.

The horizontal switching switch 32 and the vertical switching switch 33 typically select the horizontal synchronous signal oscillator 60 and the vertical synchronous signal oscillator 61, respectively. The switching switch 33 is selected by switching to the double horizontal synchronous signal oscillator 30 and the double vertical synchronous signal oscillator 31, respectively.

In the horizontal sawtooth wave generator 35 and the vertical sawtooth wave generator 36, for example, the voltage change due to the charging time determined by the RC constants of the double horizontal synchronous signal oscillator 30 and the double vertical synchronous signal oscillator 31 Due to the sawtooth wave.

Accordingly, similarly to the first embodiment, the 3D image is displayed on the display device 50 at a speed of 60 frames per second by high-speed scanning.

Also in the second embodiment, the method of generating the sawtooth wave is different, and the operation of high-speed scan display is performed similarly to the first embodiment.

In a typical video signal from the cable 25 or from the TV tuner 42, these oscillators are matched with a horizontal synchronization signal of 15,750 Hz and a vertical synchronization signal of 60 Hz when the screen display speed of NTS or YAL is 30 Hz. Sawtooth waves can be generated regularly to watch ordinary 2D videos and the like.

In the above description, the VTR has been described as an example, but the present invention can be similarly applied to a 2D normal video signal from a DVD device or a MO device.

As described above, since the 2D / 3D conversion circuit is installed in the VTR or DVD image reproducing apparatus, many consumers can enjoy 3D images.

In addition, since the conventional TV receiver is easily upgraded to realize high-speed scan display, 3D video can be viewed at low cost.

It is possible to produce a display device that displays a field screen scanned at twice the speed at low cost simply by adding a process of adding a small part to a production line of a conventional TV receiver. In addition, a conventional TV receiver already sold and used simply implements a stereoscopic TV that is scanned at twice the speed at a low price by simply adding a small part from a radio company. In addition, the present invention can contribute to the development of stereo images in the future, such as the development of 3D video software, the spread of stereoscopic TVs, and the development of 3D games.

Claims (3)

A stereoscopic image display device which provides a stereoscopic effect by signal processing a normal image signal, An analog / digital converter for converting an analog signal of a reproduced two-dimensional image into a digital signal; The converted digital two-dimensional image is moved only in the horizontal direction corresponding to the parallax of the left and right eyes, the original image is a two-dimensional image corresponding to the left eye or the right eye, and the image after the movement is stored as a two-dimensional image for the right or left side. Memory; A reading unit which reads these left and right images alternately for each frame screen at high speed; A timing unit configured to output an open / close signal in accordance with the read timing of the left and right images; And a digital / analog converter for converting the digital signals of the left and right images from the reader into analog signals and generating a high speed synchronization signal. A high speed synchronous signal generator in addition to a normal speed synchronous signal generator; A switch for selectively switching the normal speed and the high speed synchronous signal; A TV receiver having a built-in; a switching signal generator for generating a switching signal in a state of receiving a signal from the digital / analog converter, The digital / analog converter sends the left and right image signals to the TV receiver together with the high speed synchronization signal, and the display unit of the TV receiver alternately displays the left and right screens at high speed according to the high speed synchronization signal and the switching signal. And displaying the displayed image alternately with the left and right eyes through liquid crystal shutter glasses that are opened and closed by an opening and closing signal from the timing unit, thereby realizing a pseudo stereoscopic effect in a two-dimensional image. According to claim 1, And the video image recording and reproducing apparatus is a VTR or DVD apparatus. According to claim 1, And the high speed vertical synchronizing signal corresponds to 120 Hz, and the high speed vertical synchronizing signal corresponds to 120 Hz.